Reference signal compensation to train neural network
Example embodiments of the present disclosure relate to compensating reference signals to train a neural network. According to embodiments of the present disclosure, a solution for compensating reference signals to train a neural network is proposed. A second device transmits information to a first device. The information is used to trigger generation and transmission of compensated training reference signals. The information indicates a set of receiving ports at the first device. The first device compensates the training reference signals based on downlink channel information and transmits the compensated signals to the second device via one or more transmitting ports. In this way, CSI can be obtained more accurately. Further, a processing model at the second device can be improved.
1. A first device comprising:
at least one processor; and
at least one memory
storing instructions that, when executed by the at least one processor, cause the first device at least to:
receive information indicating a set of receiving ports to be used for compensation at the first device;
determine at least one compensation parameter associating the set of receiving ports with a set of transmitting ports based on downlink channel information;
compensate at least one training reference signal with the at least one compensation parameter; and
transmit, to a second device, the at least one compensated training reference signal via the set of transmitting ports of the first device.
2. The first device of claim 1 , wherein the first device is further caused to:
receive, from the second device, at least one channel state information reference signal (CSI-RS); and
estimate the downlink channel information at all receiving ports of the first device based on the received CSI-RS, wherein the downlink channel information comprises downlink channel covariance.
3. The first device of claim 1 , wherein the information further indicating mapping between the set of receiving ports and the set of transmitting ports to be used for compensation at the first device.
4. The first device of claim 1 , wherein the information is used to trigger the first device to compensate the at least one training reference signal and transmit the at least one compensated training reference signal.
5. The first device of claim 1 , wherein the first device is caused to determine the at least one compensation parameter by:
determining a predefined direction of arrival based on the downlink channel information estimated at all receiving ports of the first device;
determining a first array response of the set of receiving ports at a downlink frequency;
determining a second array response of the set of transmitting ports at an uplink frequency; and
determining the at least one compensation parameter based on the predefined direction of arrival, the first array response and the second array response.
6. The first device of claim 5 , wherein the predetermined direction of arrival is a maximum direction of arrival.
7. The first device of claim 1 , wherein the first device is caused to compensate the at least one training reference signal by:
compensating the at least one training reference signal in phase based on the at least one compensation parameter.
8. The first device of claim 1 , wherein the information indicates a further set of receiving ports used for compensation, and wherein the first device is caused to:
determine at least one further compensation parameter associating the further set of receiving ports with the set of transmitting ports based on the downlink channel information;
compensate at least one further training reference signal with the at least one further compensation parameter; and
transmit, to the second device, the at least one further compensated training reference signal via the set of transmitting ports of the first device.
9. The first device of claim 1 , wherein the information is received via a broadcast signaling, and wherein the first device is further caused to:
transmit, to the second device, an acknowledgment to the information; and
receive, from the second device, resource information indicating resource allocation for transmitting the at least one compensated training reference signal.
10. The first device of claim 1 , wherein the information is specific to the terminal device.
11. The first device of claim 1 , wherein the first device comprises a terminal device and the second device comprises a network device.
12. A second device comprising:
at least one processor; and
at least one memory
storing instructions that, when executed by the at least one processor, cause the second device at least to:
transmit, to a first device, information indicating a set of receiving ports to be used for compensation at the first device; and
receive, from the first device, at least one compensated training reference signal transmitted via a set of transmitting ports of the first device, the at least one compensated training reference signal being compensated with at least one compensation parameter associating the set of receiving ports with a set of transmitting ports which is determined based on downlink channel information.
13. The second device of claim 12 , wherein the second device is further caused to:
transmit, to the first device, at least one channel state information reference signal (CSI-RS) used for the first device to estimate the downlink channel information at all receiving ports of the first device.
14. The second device of claim 12 , wherein the information further indicating mapping between the set of receiving ports and the set of transmitting ports of the first device.
15. The second device of claim 12 , wherein the information is used to trigger the first device to compensate the at least one training reference signal and transmit the at least one compensated training reference signal.
16. The second device of claim 12 , wherein the information indicates a further set of receiving ports used for compensation, and wherein the second device is further caused to:
receive, from the first device, at least one further compensated training reference signal transmitted via the set of transmitting ports of the first device, the at least one further compensated training reference signal being compensated with at least one further compensation parameter associating the further set of receiving ports with the set of transmitting ports which is determined based on downlink channel information.
17. The second device of claim 12 , wherein the information is transmitted via a broadcast signaling, and wherein the second device is further caused to:
receive, from the first device, an acknowledgment to the information; and
transmit, to the first device, resource information indicating resource allocation for transmitting the at least one compensated training reference signal.
18. The second device of claim 12 , wherein the second device is further caused to:
determine an estimation of a compensated uplink channel between the first device and the second device based on the at least one compensated received training reference signal; and
update a data processing model to be used for recovering channel information on a downlink channel between the first device and the second device based on the estimation.
19. The second device of claim 12 , wherein the first device comprises a terminal device and the second device comprises a network device.
20. A method comprising:
receiving information indicating a set of receiving ports to be used for compensation at a first device;
determining at least one compensation parameter associating the set of receiving ports with a set of transmitting ports based on downlink channel information;
compensating at least one training reference signal with the at least one compensation parameter; and
transmitting, to a second device, the at least one compensated training reference signal via the set of transmitting ports of the first device.